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</div><hr /><div id="intro.ev" class="preface">
  <h1 class="title">简介</h1>
  <p class="para">
   This extension provides inteface to
   <a href="http://libev.schmorp.de/" class="link external">&raquo;&nbsp;libev</a>
   library - a high performance full-featured event loop written in C.
  </p>

  <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此扩展在 Windows 平台上不可用。</span></p></blockquote>

 <p class="para">
   <em class="emphasis">Libev</em>
   is an event loop: one registers interest in certain events (such as a file
   descriptor being readable or a timeout occurring), and it will manage these
   event sources and provide the program with events.
  </p>
  <p class="para">
   To do this, it must take more or less complete control over the process (or
   thread) by executing the event loop handler, and will then communicate
   events via a callback mechanism.
  </p>
  <p class="para">
   You register interest in certain events by registering so-called event
   watchers, and then hand it over to libev by starting the watcher.
  </p>
  <p class="para">
   For details refer to the
   <a href="http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod" class="link external">&raquo;&nbsp;documentation
 of libev</a>
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